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Archive for the ‘energy’ category: Page 6

Apr 29, 2021

Jetoptera VTOL aircraft design features “bladeless fans on steroids”

Posted by in categories: energy, transportation

Seattle-based company Jetoptera says its air-accelerating Fluidic Propulsive System, which works a lot like a Dyson “bladeless” fan, produces thrust for half the fuel of a small turbojet while being the “most silent propulsion system in the skies.”

Apr 28, 2021

Material scientists find new angle toward better heat transfer

Posted by in categories: energy, materials

UCLA materials scientists have developed a class of optical material that controls how heat radiation is directed from an object. Similar to the way overlapping blinds direct the angle of visible light coming through a window, the breakthrough involves utilizing a special class of materials that manipulates how thermal radiation travels through such materials.

Recently published in Science, the advance could be used to improve the efficiency of energy-conversion systems and enable more effective sensing and detection technologies.

“Our goal was to show that we could effectively beam thermal —the all objects emanate as —over broad wavelengths to the same direction,” said study leader Aaswath Raman, an assistant professor of materials science and engineering at the UCLA Samueli School of Engineering. “This advance offers new capabilities for a range of technologies that depend on the ability to control the flows of heat in the form of thermal radiation. This includes imaging and sensing applications that rely on thermal sources or detecting them, as well as energy applications such as , waste heat recovery and radiative cooling, where restricting the directionality of heat flow can improve performance. ”.

Apr 27, 2021

Saudi Arabia’s Shift To Renewables Could Save It $200 Billion

Posted by in categories: economics, energy, finance

Saudi Arabia could save some $200 billion over the next ten years by switching from crude oil to natural gas and renewables for electricity production, Reuters reports, citing the Kingdom’s Finance Minister.

“Instead of buying fuel from the international markets at $60 and then selling it at $6 for Saudi utilities, or using some of our quota in OPEC to sell at $6, we’re going to actually displace at least 1 million barrels a day of oil equivalent in the next 10 years and replace it with gas and renewables,” Mohammed al-Jadaan said.

OPEC’s largest oil producer and world’s largest exporter of crude is on a desperate quest to reduce its dependence on oil revenues by diversifying its economy away from the flagship export stock. Earlier this year, Crown Prince Mohammed, who appears to be the de facto ruler of Saudi Arabia, announced yet another investment program with a view to this diversification that he said would “unlock new local investments valued at SAR 5 Trillion through the end of 2030.”

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Apr 27, 2021

Energy-saving gas turbines from the 3D printer

Posted by in categories: energy, materials

3D printing has opened up a completely new range of possibilities. One example is the production of novel turbine buckets. However, the 3D printing process often induces internal stress in the components, which can, in the worst case, lead to cracks. Now a research team has succeeded in using neutrons from the Technical University of Munich (TUM) research neutron source for non-destructive detection of this internal stress—a key achievement for the improvement of the production processes.

Gas turbine buckets have to withstand extreme conditions: Under and at high temperatures they are exposed to tremendous centrifugal forces. In order to further maximize energy yields, the buckets have to hold up to temperatures which are actually higher than the melting point of the material. This is made possible using hollow turbine buckets which are air-cooled from the inside.

These turbine buckets can be made using , an additive manufacturing technology: Here, the starter material in powder form is built up layer by layer by selective melting with a laser. Following the example of avian bones, intricate lattice structures inside the hollow turbine buckets provide the part with the necessary stability.

Apr 25, 2021

Geothermal Energy Could Provide All the Energy the World Will Ever Need

Posted by in category: energy

Circa 2010


Norway — There is a solution for the world’s insatiable energy needs. It is CO2-free and safe. And it’s located right under our feet.

Ever since Jules Verne wrote in 1864 about a trip to the Earth’s interior, people have dreamed of bringing up heat from the centre of the planet. So far we have only scratched the surface, but researchers are now beginning to work down into the depths.

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Apr 24, 2021

Hoverboard Test! (Part 2/2)

Posted by in categories: energy, engineering, media & arts, transportation

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Apr 23, 2021

Hubble Captures Sizzling Hot Giant Star on the Edge of Destruction – Shining With the Brilliance of 1 Million Suns

Posted by in categories: energy, space

In celebration of the 31st anniversary of the launching of NASA’s Hubble Space Telescope, astronomers aimed the renowned observatory at a brilliant “celebrity star,” one of the brightest stars seen in our galaxy, surrounded by a glowing halo of gas and dust. Credit: NASA, ESA, STScI

The mighty blue giant AG Carinae is not your normal star. One of the brightest stars in our Milky Way galaxy, AG Carinae is sizzling hot, shining with the brilliance of 1 million suns. You would need super sunscreen if you lived in the star’s vicinity. The star is up to 70 times heftier than our Sun and burning fuel at a ferocious rate.

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Apr 23, 2021

Why small planes still use leaded fuel decades after phase-out in cars

Posted by in categories: energy, engineering, government, policy, transportation

While leaded gasoline was fully phased out in 1996 with the passage of the Clean Air Act, it still fuels a fleet of 170000 piston-engine airplanes and helicopters. Leaded aviation fuel, or avgas, now makes up “the largest remaining aggregate source of lead emissions to air in the U.S.,” according to the Environmental Protection Agency.


Meanwhile residents continue to live with the air quality that comes with living near an airport where small planes burning leaded fuel fly in and out, said Alarcon, who is also a volunteer organizer with the nonprofit tenant advocacy group Vecinos Activos. It’s also unclear to air quality experts and residents what is arguably safe.

“There is no bright line that says ‘Above this concentration lead is safe and below this concentration’ that it is not. You’d have to make a policy decision,” said Jay Turner, an engineering education professor at Washington University in St. Louis and member of the EPA’s Science Advisory Board. “We’re really careful to come back to this point that just because public areas might meet the EPA standard [for lead] doesn’t mean zero risk or zero concern.”

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Apr 23, 2021

A lesson in electric school buses

Posted by in categories: business, education, energy

They require less maintenance, and less pollution. Imagine if you used them as a battery backup during an emergency.


School board seals deal to bring 300 electric school buses to Montgomery County. The buses will recharge at night and run during the day. During the hot summers, the buses and charging stations can help store needed energy for local businesses.

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Apr 22, 2021

‘Power for Power’: North Korea Returns to a Show of Force

Posted by in categories: energy, existential risks, military

Pyongyang’s recent ballistic missiles test indicated that the country is once again raising tensions to gain leverage with Washington.

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